PATAGONIA. 25882DBGR. MENS BETTER SWEATER FLEECE VEST. DARK BOREALIS GREEN. This warm 100 percent recycled polyester sweater vest combines a sweater-knit aesthetic with the easy care of Better Sweater fleece. It s dyed with a low-impact process that significantly reduces the use of dyestuffs energy and water compared to conventional dyeing methods. Fair Trade Certified sewn.